<template>
  <div>
    <el-tree
  :data="data"
  show-checkbox
  default-expand-all
  node-key="id"
  ref="tree"
  highlight-current
  @node-click="nodeClick"
  :props="defaultProps">
</el-tree>

<div class="buttons">
  <el-button @click="getCheckedNodes">通过 node 获取</el-button>
  <el-button @click="getCheckedKeys">通过 key 获取</el-button>
  <el-button @click="setCheckedNodes">通过 node 设置</el-button>
  <el-button @click="setCheckedKeys">通过 key 设置</el-button>
  <el-button @click="resetChecked">清空</el-button>
</div>
  </div>
</template>

<script>
  export default {
    methods: {
      nodeClick(value,node,vc){
        console.log('us three=>',value,node,vc);
        this.$store.commit('setMenu',value)
      },
      getCheckedNodes() {
        console.log(this.$refs.tree.getCheckedNodes());
      },
      getCheckedKeys() {
        console.log(this.$refs.tree.getCheckedKeys());
      },
      setCheckedNodes() {
        this.$refs.tree.setCheckedNodes([{
          id: 5,
          label: '二级 2-1'
        }, {
          id: 9,
          label: '三级 1-1-1'
        }]);
      },
      setCheckedKeys() {
        this.$refs.tree.setCheckedKeys([3]);
      },
      resetChecked() {
        this.$refs.tree.setCheckedKeys([]);
      }
    },

    data() {
      return {
        
        defaultProps: {
          children: 'children',
          label: 'menuname'
        }
      };
    },
    computed:{
      data(){
        return this.$store.state.menuList
      }
    }
    ,
    mounted(){
     
     this.$store.commit('setMenuList',JSON.parse(localStorage.getItem('menuList')))
    }
  };
</script>